/ Dictionary / Index N nivation: Meaning and Definition of Find definitions for: ni•va•tion Pronunciation: (nī-vā'shun), [key] — n. Geol. erosion resulting from the action of frost beneath a snowbank. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nival niveous Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language